1. Better take Cleric C2 with Heal level 10 at Rank 2 for easier leveling.
2. Possible to drop Deprotected Zone if you are building INT Cleric.
3. Reduce Monstrance to Level 1(or zero) because it only increase 1 DEX per level after level 1, I think. Plus the targeting is a bit awkward when using mouse.
4. May want to take at least level 1(the more the better) in Mass Heal if you building Support Priest.
5. May want to reduce Cleric Aspersion and Chaplain Aspergillum seems to affect only your attack. I never play as Chaplain though.